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Ball Milling

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Zhongbao Shao – One of the best experts on this subject based on the ideXlab platform.

  • Preparation of LiFePO4/C via high-temperature BallMilling route and Box-Behnken design-based optimization
    Ionics, 2019
    Co-Authors: Xuetian Li, Lina Yu, Hongmei Shao, Zhongcai Shao, Chuang Li, Zhongbao Shao

    Abstract:

    LiFePO4/C cathode material was prepared via high-temperature BallMilling route with ultrasonic dispersion as mixing process using eutectic molten salt (0.76 LiOH·H2O-0.24 Li2CO3) as lithium source. Box-Behnken design was used to study the combined effects of ultrasonic time, BallMilling temperature, and BallMilling time on the discharge capacity to obtain the optimum predicted conditions. The optimum conditions were as follows: ultrasonic time was 63 min, BallMilling temperature was 638 °C, and BallMilling time was 7 h. LiFePO4/C prepared from the optimized experimental conditions exhibited a well electrochemical performance; its discharge capacity was 161.3 mAh g−1 at a 0.1 C-rate which was in consistence with the predicted discharge capacity of 160.2 mAh g−1. Moreover, its capacity retention rate achieved 93.6% at a 10 C-rate over 100 cycles.

  • Influence of Temperature on the Performance of LiNi1/3Co1/3Mn1/3O2 Prepared by High-Temperature BallMilling Method
    Advances in Materials Science and Engineering, 2018
    Co-Authors: Ming Tian, Xuetian Li, Zhongbao Shao, Fengman Shen

    Abstract:

    Aiming at the preparation of high electrochemical performance LiNi1/3Co1/3Mn1/3O2 cathode material for lithium-ion battery, LiNi1/3Co1/3Mn1/3O2 was prepared with lithium carbonate, nickel (II) oxide, cobalt (II, III) oxide, and manganese dioxide as raw materials by high-temperature BallMilling method. Influence of BallMilling temperature was investigated in this work. It was shown that the fine LiNi1/3Co1/3Mn1/3O2 powder with high electrochemical performance can be produced by the high-temperature BallMilling process, and the optimal BallMilling temperature obtained in the current study was 750°C. Its initial discharge capacity was 146.0 mAhg−1 at the rate of 0.1 C, and over 50 cycles its capacity retention rate was 90.2%.

  • pretreatments assisted high temperature Ball Milling route to li4ti5o12 and its electrochemical performance
    Materials Letters, 2014
    Co-Authors: Zhongbao Shao

    Abstract:

    Abstract Spinel Li4Ti5O12 was synthesized via a high temperature Ball Milling route with the assistance of ultrasonic dispersion, mechanical agitation, and glucose monohydrate solid phase dispersant, respectively. The crystal structures and the electrochemical properties of the as-prepared Li4Ti5O12 were systematically investigated. The results showed the as-prepared samples were highly-crystalline and exhibited high capacities and good cycle stabilities. The initial discharge capacity of sample C5 mixed with 5% glucose monohydrate reached 187.003 mA h/g at 0.1 C-rate, and retained at 183.509 mA h/g after 20 cycles. This facile solid phase dispersant-assisted high temperature Ball Milling method could be an excellent way to synthesize Li4Ti5O12 for practical applications.

Tiejun Wang – One of the best experts on this subject based on the ideXlab platform.

  • Enhanced Sugar Alcohol Production from Cellulose by Pretreatment with Mixed BallMilling and Solid Acids
    Bioresources, 2016
    Co-Authors: Longlong Ma, Tiejun Wang

    Abstract:

    Efficient pretreatment is the key step in catalytic biomass conversion. Herein, a mixed BallMilling method was used to pretreat cellulose with a solid catalyst. The method was tested with solid acid and commercial 5 wt% Ru/C in water, and the effect of pretreatment on yield was measured by the hydrolytic-hydrogenation of cellulose to sugar alcohols, which are the platform compounds for the production of gasoline and fine chemicals. The influence of BallMilling mode, time, and reaction parameters was studied. The properties of cellulose and the catalyst were also analyzed before and after treatment. The yield of sugar alcohols reached 90.3% at 463 K with amorphous zirconium phosphate (ZrP) and Ru/C and a mixed BallMilling time of 2 h. The high sugar alcohol yield was achieved 12 times faster than with the single BallMilling method under the same reaction conditions for 24 h. This effect is ascribed to the enhanced contact between cellulose and catalyst, which promotes the rate-determined cellulose depolymerization to obtain high sugar alcohols yield.

  • process intensification effect of Ball Milling on the hydrothermal pretreatment for corn straw enzymolysis
    Energy Conversion and Management, 2015
    Co-Authors: Zhengqiu Yuan, Tiejun Wang, Jinxing Long, Riyang Shu, Qi Zhang

    Abstract:

    Enhancement of the cellulose accessibility is significant for biomass enzymatic hydrolysis. Here, we reported an efficient combined pretreatment for corn straw enzymolysis using Ball Milling and dilute acid hydrothermal method (a mixture solvent of H2O/ethanol/sulfuric acid/hydrogen peroxide liquid). The process intensification effect of Ball Milling on the pretreatment of the corn straw was studied through the comparative characterization of the physical-chemical properties of the raw and pretreated corn straw using FT-IR, BET, XRD, SEM, and HPLC analysis. The effect of the pretreatment temperature was also investigated. Furthermore, various pretreatment methods were compared as well. Moreover, the pretreatment performance was measured by enzymolysis. The results showed that Ball Milling had a significant process intensification effect on the corn straw enzymolysis. The glucose concentration was dramatically increased from 0.41 to 13.86 mg mL(-1) after the combined treatment of Ball Milling and hydrothermal. The efficient removal of lignin and hemicellulose and the enlargement of the surface area were considered to be responsible for this significant increase based on the intensive analysis on the main components and the physical-chemical properties of the raw and pretreated corn straw. (C) 2015 Elsevier Ltd. All rights reserved.

  • promoting hydrolytic hydrogenation of cellulose to sugar alcohols by mixed Ball Milling of cellulose and solid acid catalyst
    Energy & Fuels, 2014
    Co-Authors: Yuhe Liao, Tiejun Wang, Jinxing Long, Qi Zhang, Yuping Li

    Abstract:

    Enhancing the contact or interaction between cellulose and solid catalyst is a significant aspect in its efficient catalytic conversion. Herein, mixed Ball Milling of cellulose and solid catalyst was presented to achieve this goal, and the promotion effect was measured by hydrolytic hydrogenation of cellulose to sugar alcohols (the platform compounds for biogasoline) with solid acid and commercial 5 wt % Ru/C in water. The effects of BallMilling modes, time, and reaction parameters were studied. The properties of cellulose and solid acid catalyst before and after treatment were also analyzed. The yield of sugar alcohols reached 90.3% at 463 K with amorphous zirconium phosphate and Ru/C (mixed BallMilling time of 2 h). This high yield of sugar alcohols achieved in the mixed BallMilling time of 2 h was 12 times faster than that by the single Ball Milling of 24 h under the same reaction conditions. It is ascribed to the enhanced contact between cellulose and catalyst, resulting in promoting cellulose depo…

Yuping Li – One of the best experts on this subject based on the ideXlab platform.

  • promoting hydrolytic hydrogenation of cellulose to sugar alcohols by mixed Ball Milling of cellulose and solid acid catalyst
    Energy & Fuels, 2014
    Co-Authors: Yuhe Liao, Tiejun Wang, Jinxing Long, Qi Zhang, Yuping Li

    Abstract:

    Enhancing the contact or interaction between cellulose and solid catalyst is a significant aspect in its efficient catalytic conversion. Herein, mixed Ball Milling of cellulose and solid catalyst was presented to achieve this goal, and the promotion effect was measured by hydrolytic hydrogenation of cellulose to sugar alcohols (the platform compounds for biogasoline) with solid acid and commercial 5 wt % Ru/C in water. The effects of BallMilling modes, time, and reaction parameters were studied. The properties of cellulose and solid acid catalyst before and after treatment were also analyzed. The yield of sugar alcohols reached 90.3% at 463 K with amorphous zirconium phosphate and Ru/C (mixed BallMilling time of 2 h). This high yield of sugar alcohols achieved in the mixed BallMilling time of 2 h was 12 times faster than that by the single Ball Milling of 24 h under the same reaction conditions. It is ascribed to the enhanced contact between cellulose and catalyst, resulting in promoting cellulose depo…